ICD-10-CM > O00-O9A > O30-O48 > O35 > O35.B O35.B Maternal care for other (suspected) fetal abnormality and damage, fetal cardiac anomalies Non-Billable/Non-Specific Codes O35.BXX0..., not applicable or unspecifiedO35.BXX1..., fetus 1O35.BXX2..., fetus 2O35.BXX3..., fetus 3O35.BXX4..., fetus 4O35.BXX5..., fetus 5O35.BXX9..., other fetus